| #ifndef __LINUX_HUB_H |
| #define __LINUX_HUB_H |
| |
| /* |
| * Hub protocol and driver data structures. |
| * |
| * Some of these are known to the "virtual root hub" code |
| * in host controller drivers. |
| */ |
| |
| #include <linux/list.h> |
| #include <linux/workqueue.h> |
| #include <linux/compiler.h> /* likely()/unlikely() */ |
| |
| /* |
| * Hub request types |
| */ |
| |
| #define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE) |
| #define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER) |
| |
| /* |
| * Hub class requests |
| * See USB 2.0 spec Table 11-16 |
| */ |
| #define HUB_CLEAR_TT_BUFFER 8 |
| #define HUB_RESET_TT 9 |
| #define HUB_GET_TT_STATE 10 |
| #define HUB_STOP_TT 11 |
| |
| /* |
| * Hub Class feature numbers |
| * See USB 2.0 spec Table 11-17 |
| */ |
| #define C_HUB_LOCAL_POWER 0 |
| #define C_HUB_OVER_CURRENT 1 |
| |
| /* |
| * Port feature numbers |
| * See USB 2.0 spec Table 11-17 |
| */ |
| #define USB_PORT_FEAT_CONNECTION 0 |
| #define USB_PORT_FEAT_ENABLE 1 |
| #define USB_PORT_FEAT_SUSPEND 2 |
| #define USB_PORT_FEAT_OVER_CURRENT 3 |
| #define USB_PORT_FEAT_RESET 4 |
| #define USB_PORT_FEAT_POWER 8 |
| #define USB_PORT_FEAT_LOWSPEED 9 |
| #define USB_PORT_FEAT_HIGHSPEED 10 |
| #define USB_PORT_FEAT_C_CONNECTION 16 |
| #define USB_PORT_FEAT_C_ENABLE 17 |
| #define USB_PORT_FEAT_C_SUSPEND 18 |
| #define USB_PORT_FEAT_C_OVER_CURRENT 19 |
| #define USB_PORT_FEAT_C_RESET 20 |
| #define USB_PORT_FEAT_TEST 21 |
| #define USB_PORT_FEAT_INDICATOR 22 |
| |
| /* |
| * Hub Status and Hub Change results |
| * See USB 2.0 spec Table 11-19 and Table 11-20 |
| */ |
| struct usb_port_status { |
| __le16 wPortStatus; |
| __le16 wPortChange; |
| } __attribute__ ((packed)); |
| |
| /* |
| * wPortStatus bit field |
| * See USB 2.0 spec Table 11-21 |
| */ |
| #define USB_PORT_STAT_CONNECTION 0x0001 |
| #define USB_PORT_STAT_ENABLE 0x0002 |
| #define USB_PORT_STAT_SUSPEND 0x0004 |
| #define USB_PORT_STAT_OVERCURRENT 0x0008 |
| #define USB_PORT_STAT_RESET 0x0010 |
| /* bits 5 to 7 are reserved */ |
| #define USB_PORT_STAT_POWER 0x0100 |
| #define USB_PORT_STAT_LOW_SPEED 0x0200 |
| #define USB_PORT_STAT_HIGH_SPEED 0x0400 |
| #define USB_PORT_STAT_TEST 0x0800 |
| #define USB_PORT_STAT_INDICATOR 0x1000 |
| /* bits 13 to 15 are reserved */ |
| |
| /* |
| * wPortChange bit field |
| * See USB 2.0 spec Table 11-22 |
| * Bits 0 to 4 shown, bits 5 to 15 are reserved |
| */ |
| #define USB_PORT_STAT_C_CONNECTION 0x0001 |
| #define USB_PORT_STAT_C_ENABLE 0x0002 |
| #define USB_PORT_STAT_C_SUSPEND 0x0004 |
| #define USB_PORT_STAT_C_OVERCURRENT 0x0008 |
| #define USB_PORT_STAT_C_RESET 0x0010 |
| |
| /* |
| * wHubCharacteristics (masks) |
| * See USB 2.0 spec Table 11-13, offset 3 |
| */ |
| #define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */ |
| #define HUB_CHAR_COMPOUND 0x0004 /* D2 */ |
| #define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */ |
| #define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */ |
| #define HUB_CHAR_PORTIND 0x0080 /* D7 */ |
| |
| struct usb_hub_status { |
| __le16 wHubStatus; |
| __le16 wHubChange; |
| } __attribute__ ((packed)); |
| |
| /* |
| * Hub Status & Hub Change bit masks |
| * See USB 2.0 spec Table 11-19 and Table 11-20 |
| * Bits 0 and 1 for wHubStatus and wHubChange |
| * Bits 2 to 15 are reserved for both |
| */ |
| #define HUB_STATUS_LOCAL_POWER 0x0001 |
| #define HUB_STATUS_OVERCURRENT 0x0002 |
| #define HUB_CHANGE_LOCAL_POWER 0x0001 |
| #define HUB_CHANGE_OVERCURRENT 0x0002 |
| |
| |
| /* |
| * Hub descriptor |
| * See USB 2.0 spec Table 11-13 |
| */ |
| |
| #define USB_DT_HUB (USB_TYPE_CLASS | 0x09) |
| #define USB_DT_HUB_NONVAR_SIZE 7 |
| |
| struct usb_hub_descriptor { |
| __u8 bDescLength; |
| __u8 bDescriptorType; |
| __u8 bNbrPorts; |
| __le16 wHubCharacteristics; |
| __u8 bPwrOn2PwrGood; |
| __u8 bHubContrCurrent; |
| /* add 1 bit for hub status change; round to bytes */ |
| __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8]; |
| __u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8]; |
| } __attribute__ ((packed)); |
| |
| |
| /* port indicator status selectors, tables 11-7 and 11-25 */ |
| #define HUB_LED_AUTO 0 |
| #define HUB_LED_AMBER 1 |
| #define HUB_LED_GREEN 2 |
| #define HUB_LED_OFF 3 |
| |
| enum hub_led_mode { |
| INDICATOR_AUTO = 0, |
| INDICATOR_CYCLE, |
| /* software blinks for attention: software, hardware, reserved */ |
| INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF, |
| INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF, |
| INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF |
| } __attribute__ ((packed)); |
| |
| struct usb_device; |
| |
| /* Transaction Translator Think Times, in bits */ |
| #define HUB_TTTT_8_BITS 0x00 |
| #define HUB_TTTT_16_BITS 0x20 |
| #define HUB_TTTT_24_BITS 0x40 |
| #define HUB_TTTT_32_BITS 0x60 |
| |
| /* |
| * As of USB 2.0, full/low speed devices are segregated into trees. |
| * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). |
| * The other type grows from high speed hubs when they connect to |
| * full/low speed devices using "Transaction Translators" (TTs). |
| * |
| * TTs should only be known to the hub driver, and high speed bus |
| * drivers (only EHCI for now). They affect periodic scheduling and |
| * sometimes control/bulk error recovery. |
| */ |
| struct usb_tt { |
| struct usb_device *hub; /* upstream highspeed hub */ |
| int multi; /* true means one TT per port */ |
| unsigned think_time; /* think time in ns */ |
| |
| /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ |
| spinlock_t lock; |
| struct list_head clear_list; /* of usb_tt_clear */ |
| struct work_struct kevent; |
| }; |
| |
| struct usb_tt_clear { |
| struct list_head clear_list; |
| unsigned tt; |
| u16 devinfo; |
| }; |
| |
| extern void usb_hub_tt_clear_buffer (struct usb_device *dev, int pipe); |
| |
| struct usb_hub { |
| struct device *intfdev; /* the "interface" device */ |
| struct usb_device *hdev; |
| struct urb *urb; /* for interrupt polling pipe */ |
| |
| /* buffer for urb ... with extra space in case of babble */ |
| char (*buffer)[8]; |
| dma_addr_t buffer_dma; /* DMA address for buffer */ |
| union { |
| struct usb_hub_status hub; |
| struct usb_port_status port; |
| } *status; /* buffer for status reports */ |
| |
| int error; /* last reported error */ |
| int nerrors; /* track consecutive errors */ |
| |
| struct list_head event_list; /* hubs w/data or errs ready */ |
| unsigned long event_bits[1]; /* status change bitmask */ |
| unsigned long change_bits[1]; /* ports with logical connect |
| status change */ |
| unsigned long busy_bits[1]; /* ports being reset or |
| resumed */ |
| #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */ |
| #error event_bits[] is too short! |
| #endif |
| |
| struct usb_hub_descriptor *descriptor; /* class descriptor */ |
| struct usb_tt tt; /* Transaction Translator */ |
| |
| unsigned mA_per_port; /* current for each child */ |
| |
| unsigned limited_power:1; |
| unsigned quiescing:1; |
| unsigned activating:1; |
| unsigned resume_root_hub:1; |
| |
| unsigned has_indicators:1; |
| enum hub_led_mode indicator[USB_MAXCHILDREN]; |
| struct delayed_work leds; |
| }; |
| |
| #endif /* __LINUX_HUB_H */ |